/*
 * Copyright 2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.pajamas.starter.integration.spring.amqp;

import com.google.common.collect.Lists;

import com.rabbitmq.client.Channel;

import org.apache.commons.collections4.IteratorUtils;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;

import java.util.Iterator;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

import lombok.extern.slf4j.Slf4j;

/**
 * @author william
 * @since 2024/5/21
 */
@Slf4j
public class DeadLetterListener {
    private final List<DeadLetterPolicy> policies;

    public DeadLetterListener(Iterator<DeadLetterPolicy> policies) {
        this.policies = Lists.newArrayList();
        if (!IteratorUtils.isEmpty(policies)) {
            this.policies.addAll(Lists
                    .newArrayList(policies)
                    .stream()
                    .filter(Objects::nonNull)
                    .collect(Collectors.toList()));
        }
    }

    @RabbitListener(queues = Namings.DLQ)
    public void onSubscribe(Message message, Channel channel) {
        for (DeadLetterPolicy policy : policies) {
            if (policy.canApply(message.getMessageProperties())) {
                policy.apply(message, channel);
            }
        }
    }
}
